Recording dial for radiosets



1,611,191 E. G. BALLENGE?V f REGORDIG DIAL FOR RADIO sETs Feb.` s, 1927.

Filed Aug. 7, 1925 5 maentoz Patented Feb. 8, 192i?. l

wma

" l Y EDGAR G. BALLENefna, oriA'rLAN'ra, (manera.A

U v nnoonnrnernar. knon. Ramosiirs. f

'.Ap'pncafion fued'augusr 7;,'1925f seran- No, lfinale;

, Thisinvention lrelates to radio apparatus lo latter, vwhen a station is tuned' in, maybel subsequently vre-located when yit is again desired to hear the station Vwithout the usual uncertainty and time-consuming.,manipula@ tion incident to theact of tuning in.

- Other objects of the invention relate to .the form and construction of the indicating means and Vits co-relation with the dial whereby maximum space is made available for Athe recording of the station names or other data, and the invention also concerns itself with such novel and speciiic features of construction and arrangement of parts as will appear in the following description tion. j j. n, In the drawings`r 'j .j

Figure 1 isla front yelevation of Vone form VFigure ,2'is a A along the line 2,.--2y of Figure 1. j

j Figure 3 is a front elevation showing a slightly Imodified form of myAin-ventio'nl i Figurer i is azftransverse 'sectionv taken alongthe line of Figure l3. Y i f Y VFigure isa front levation showingstill another form of the invention. Y

VFigure Gis a'vertic'al section taken along the line k(if-G of Figure i Y' Referring nowv in detail to the several igures,and first adverting to that form of the invention illustrated in Figures-1 and 2, the vnumeral 1 `represents the panel-board of a radio receiver through which projects the shaft` 2 of any suitable tuning device such as a coil, coupler or variable condenser. l QA dialv 3 is secured to the projecting en'd of the shaft 2 in any suitable manner, as for instance, by the set screw 5. .The dial, in the illustration is provided with a knob 5 50, by means of which it may be turned simultaneously withthe adjustment of the tuning unit. It is obvious that in so far Vas the rotation ofthe dial `is concerned the knob is not essential being usually omitted in reof an'illustrative embodiment lof the inve'n-k n l i ly large to befplainlyiegiblm it'fi's preferred transverse .section taken ceiving sets of thesuper-heterodyne type .in v which the tuning unit is moved by Ineansindependent of the dial,` the lat-terr rotating withthe shaft of the tuning unit. The dial 3 is, enclosed withinacasingo, the Vlatter@-f being dishedfto form 4a. chamber ink which the 60 dial is freely rotatable and having a flange-" y Y by means of'which 'the casing is secured lto j the panel.y A `central l'aj'aerture in, the casj ingl permits ytheV p'rotrusiontof the lknob 5.

'The front wall'of thevcasing 'G isgcutfaway 16a' v diametrically Von opposite ysides of the.'Shaftv 2 to form-windows and!) thereby giving access tothe 4suifacevof the dial Vwhich isy-pref pared@ S0 that yit may-receive and render.

Visibleleadpeneilor inkv notations thatl may be 'inscribed thereupon. A part of the cas-y ingadjacent the windowsfis shaped to form' y pointers l0fand l1 which `l serve asV indicators l to` which the inscribed 4notations bere-V ferred;

.Y D Y 75V In order that the inaximuinnumber of notations may beplaced uponthe dial and Y v vthat they may at the Sametime be sufficientthat there fbe roomfforl twdseries, of*` said S0 notations, kone adjacent thecenter of the., dialand fthe yother adjacentv its periphery. The'w'indows'S and vQfare so arranged "that the former overlietheperipheral por-tioni of the dial while the latter :'overlies thatk porf tion adjacent theLce'nter," A 'Y Although most ning devices liave'an i operative range of 1180?',77v1t is ydesirable to l utilize `th'elentir'e surface ofthe 'dialfor the inscription of 'jnotationsfl To accOIlplifsli 9G this thewindows are duplicated on opposite vsidesof Vthe axis `of rotation of vthe ydial and` stationsz'which are adjacent Vaccording to wave length are notated on opposite'sides of the face of the dial so as to be visible through oppositely'arranged windows.

In Figures 3 and l the casing 6 is omitted but an :equivalent indicating device is provided in the form of a bent wire or sheet metal bandl 12 arrangedto pass diametri- 100 `cally across the face of the dial and being secured to the panel at opposite sidesof the dial. Said band is provided withwindows 13 and 14 corresponding respectively to the Y. f

, windows 8 and 9 inthe casingi and being 105' arranged with'siinilar indicating pointers 15, and 16. l I

VVInlvthat form ofltliefinvention shown? in Figures 5 and 6 the dial is geared in tWo to one relation to the tuning unit so that vit makes a complete revolution While the tuning unit moves through its operative range of 1800. The tuning unit is in this instance represented as a variable condenser 17 the rotor vshaft of which is prof vided with a gear 18 meshing with `a half-sized gear 19 mounted on a stub-shaft 20, the latter projecting through the panel and carrying the dial 21. Said dial is here shown as being enclosed by a casing 22 which differs `from the casing shown in Figure 1 only inthe fact that the Windows 23 and 24 are provided on one .side of said casing7 t-his being the sole change necessitated by the fact of the complete rotation of the dial 421. It is apparentv that stations adjacent With respect to Wave length may be notated` in the dial consecutively in staggered order one being visible through the peripheral Window and the other through that Window adjacent the center of the dial.

In operation, a station having beenl tuned in, the name of the station is inscribed adjacent the end of the most vconvenient of the indicating pointers. l/Vhen it is desired vagain yto tune in upon the same station it is merely `necessary to move the dial until the inscribed name of the station is in its original position With respect to the indicating pointer. It is obvious that once the dial/has been inscribed with the names of stations previously tuned in, the combined dial and indieatdr` becomes a station selector' by means of Which stations may be efficiently tuned in by a single .setting of the dial with respect to the indicator, avoiding the uncertainty and guess-Work which is incidental to tuning in, as ordinarily practiced;

vWhile I have herein illustrated and described What Ibelieve to, be a preferred and practicalV form ofV my invention itis to be understood that such changes may lbe made in ,the construction and arrangement of parts as are consistent .with the terms of the appended'clanns. Y l

Having described my invention what IV claim as new and desire to secure by Letters Y Patent, is

1. In radio apparatus, a station selector comprising a dial adapted to be mounted upon the rotor of a tuning unit, said dial havingla surface adapted to receivevvritten matter, and an indicator fiXedly mounted with respect to said dial having a space bridged by a pointer carrying member to form a. plurality of YWindows arranged side by side in a radial direct-ion, exposing the inscribedsurface of said dial in sequential portions, in peripheral and central Zones.

`2. In radio apparatus, a station Yselector comprising a dial adapted to be mounted upon the rotor of a tuning unit, said dial having ay surface adapted to receive Written matter, and an indicator' lixedly mounted with respect to said dial having a. pluralityv of spaces arranged. diametrically, an equal number on each side of said dial, Vand pointer carrying members bridgingv spaces to form a plurality of Windows exposing the inscribed surface of the latter simultaneously upon opposite sides in peripheral and central zones.

3.111 radio apparatus, a. station selector comprising a dial adapted to be'mounted upon a rotor of a tuning unit, said dial having a surface adapted to receive Written matter, and 'an rindicator extendingacross the 4face of said dial and iiXed With respect thereto, said indicator being formedof a 'Wire bent to forma central loop adapted to surround the stem of the dial knob, and bent at its extremities to form loops for the reception of securing means, said indicator being formedv With elongated loops intermediate saidcentral and terminal loops, and pointer carrying transverse members 'bridging saidpelongated loops transversely at intermediate points .forming a .plurality of 4Windows symmetrically,spaced on diametri@ cally opposite sides of said dial. p

In testimony whereof I have hereunto set my hand. f

Ensae` Je. BALLENGER. 

